Electric riveting apparatus.



N. MACNEALE.

ELECTRIC RIVETING APPARATUS.

APPLICATION FILED AUG.25.19T6.

Patented Mar.- 18,1919.

2 SHEETS-SHEETT I I I I I I INVENTOI? ATTORNEY} N. MACNEALE. ELECTRIC RIVETING APPARATUS.

APPLICATION FILED A UG.25. I916.

Patented Mar. 18,1919.

2 SHEETS-SHEET 2- Q Y By v ATTORNEYS.

uniran sir monastic, or oiirorii'im'ri; onto, assicivori, er iansn'n assicrn'iireirrs; To 'rnoiesonr rimiorarc ivnnnine coerrenv, or train, rziassecifrusiirrs, a oonrm RATIO}; OF- MASSACHUSETTSS IE-LEGTBIIG %IVETII TG- A'EPEAti-ATUS.

To all whom it may concern:

Be it known that I, NEIL l /lACNEALE, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and Stateof Dhio, have invented certain new and useful Improvements in Electric Riveting Appara- 1511s, of which the following is a full, clear, and exact specification.

The principal object of my invention 1s to provide a new and improved machine for heading rivets involving a preliminary heating of them electrically. Another ob ect ofmy invention is to provide a riveting ma chine with an electrode and a riveting die that may be applied successively, the electrode to complete an electric circuit through the rivet to heat it, and the die to be applied thereafter to head the rivet. ,Zitill another object of my invention is to provide an electric riveting machine with an anvil to re ceive the head of the rivet and a reciprocable member in opposition to the anvil carrying both an electrode and a riveting die, either of which may be applied alternatively to the rivet. All these objects and others will be apparent in the following specification and claims taken with the accompanying drawings in which I have illustrated one specific embodiment of my invention. It will be understood that the invention is defined in the appended claims. I now proceed to describe the particular embodiment of my invention which is shown in the drawings.

Figure 1 is a side elevation of the embodi' merit of my invention which 1 have chosen to describe in this specification;

- 2 is a partial front; elevation of the same in conjunction with a diagrammatic representation of the electric circuits therefor, and

Fig, is an elevation partly in section of a certain valve and associated elements which are hidden from view in Fig. 1.

The frame 11 carries an adjustable copper bracket 12 on the copper guide 24- which is insulated from the frame at25. (hi the coper bracket 12 is a lower copper die or anvil older 13 carrying the copper die or a vil 14 (which also serves as an electrode) adapted to receive the head of a rivet 15.

The upper part of the frame 11 has suit able vertical guides in which the member 16 is adapted to slide up and down. This mem her 16 has a copper electrode holder 1? Specification of Letters Iratcnt.

bolted to its lower end by the bolts 19 and separated therefrom by insulation 18. The copper electrode holder 17 carriesa copper electrode 20 in alinement with the anvil 14.

Flexible copper strips 21 are bolted to the copper holder 17 and connected to one tor-.1 minal of the secondary oi" the transformer. 22, the other termlnal 23 being connected to Patented Mar; 18, leis,

Application filed August 25,1516. Serial tic. mares.

the guide plate Ql that carries the bracket 12'." I

The lower end of thereciprocable member lo has a pair of horizontal guides 26, ink which are the slides 27 carrying the. depending member 28 with a die 29 at its lower end adapted iii one position to engage the rivet 15. A bell crank is pivoted DD the recipro-u- 170 to one arm 31, and the other arm 30 engages the die member 28 so that by operating-the i cable member 16 with a handle 82 connected handle this die member1 28 can be dis placed horizontally on the lower end ofthe;

.j is connected to the upper sliding member 16.

A. toggle goint 33 end of the vertical re ciprocable member 16. and the tension 'soring3 l normally holds the '5 toggle broken, and raises the member 16,,ini Y which the spring'35 acting on the lever 36 assists. The air cylinder 37, has a piston 38 connected by a rod 4:1 to the toggle 33. The;

cylinder 37 is pivoted at 39 and carriesa counterweight 4:0. I i r A pressure air pipe 42 leads directly through a branch .16 tcthe valve casing i3, and through a another branch same casing 43.

a port connected by a pipe to the dyl pressure rediicer {i8 and 4 to another port of the ilhis casing 43 also has 3 inder 37 behind the piston 38., and the;

casin sf-lalso has an exhaust, port 49.

Within the casing l3 is the valve member 45 w carrying the crank 50 and handle 51.

As will be seen from Fig. 3, a downward movement of the handle 51 connects the cylinder 3'7 to receive high pressure air, an upward movement of the handle 51 connects to re- '1 ceive Lower pressure air, and an intermediate position of the handle 51 connects the cylinder 3'? to the exhaust.

in. the handle 51 is a thumb operated switch 52 adapted to connect the conductors Q which are in a local circuit with the mags net 54.. The latter, when energized, attracts its armature 55 and closes at 56 the primary,

circuitof the transformer 22 from the alter hating current generator 57.

The-work to be riveted is brought in such position that the head of a rivet rests on the electrode anvil 14. The handle 32 is pulled down thus displacing thedie 29 to the right of the position shown in Fig. 1. The handle 51 is raised admitting low pressure air through the valve 45 behind the piston 38 which acts on the toggle 33 to push the electrode 20 down against the rivet 15. At the same time a switch 52 is operated by the thumb of the hand on the handle 51 closing the circuit through the magnet 54 and thus closin at 56 the primary circuit of the trans ormer 22. The secondary circuit of this transformer having been closed through the electrode 14, rivet 15 and electrode 20, a current of high amperage and low voltage goes therethrough heating the rivet to a suitable degree for heading. Thereupon, the thumb switch 52 is opened, thus cuttlng off the supply of current through the rivet and the handle 51 is lowered to its intertrnediate position connecting the cylinder 37 to the exhaust port 49, permitting the spring 34 to break the toggle 33 and with the assistance of spring 35 raise the member 16 and thereby aise the electrode 20 from the rivet 15. i, ext the handle 32 is pushed up to the position shown in the drawings, thus bringing the riveting die 29 to a position in alinement with the rivet 15. Then the handle 51 is pulled down from its intermediate position so as to connect the valve 45 to transmit high pressure air to the cylinder 37 This straightens the toggle 33 and lowers the member 16 forcing the die 29 on the rivet 15 and suitably heading the same. Returning the handle 51 to its intermediate position permits the cylinder 37 to exhaust through the port 49 so that the springs 34 and 35 again raise the member 16. This completes a cycle of operations for heatlng and heading the rivet 15.

It will be seen that I have provided acomparatively simple and convenient device by which two different members may be applied in succession to a rivet resting on the anvil, the first member acting as an electrode to supply an electric current to the rivet for heating it, and the second member acting as a riveting die. With my improved machine the operatin of heating and heading the rivets 15 can be performed very rapidly and efi'ectively.

Having thus described my invention, I declare that what I claim as new and desire to secure by Letters Patent, is

1. In an electric riveter, an electrode anvil to receive he head of a rivet, an opposed member movable to or from the anvil, an electrode carried by said member, a riveting die also carried by said member, one of said two elements that are carried by said member bein displaceable laterally relatively to the mem r so as to throw it in or out of alinement with said anvil, whereby either electric current through said electrodes and an interposed rivet.

2. In an electric riveter, an electrode anvil to receive the head of a rivet, an op posed member movable to or from the anvil, an electrode carried by said member, a riveting die also carried by aid member, one of said two elements that are carried by said member being located permanently in alinement with the said anvil, the other such element carried by said member being displaceable laterally relatively to the member so as to throw it in or out of 'ali-nement with said anvil, whereby either said element may be brought into engagement with the rivet, and means to supply an electric current through said electrodes and an interposed rivet.

3. In an electric-riveter, an electrode anvil to receive the head of a rivet, an opposed member movable to or from the anvil, an electrode fixed thereon in alinemenrt with said anvil, a riveting die mounted on said member and adapted to be displaced latin said transverse. guide and adapted in one position to be between said electrode and sand anvil, and means to supply an electric current through said electrodes and an interposed rivet.

5. In an electric riveter, an electrode anvil to receivethe head of a rivet, an opposed member movable to or from the anvil, an electrode carried by said member, a riveting die also carried by said member and displaceable lateral-1y relatively thereto, a

lever pivoted on the member, and. engaging said riveting die at one point and having a handle at another polnt, and means to supply an electric current through said,

electrodes and an interposed rivet.

6. In an electric riveter, an electrode anvil to receive the head of a rivet," 'an opposed member movable to or from the anvil, an electrode and a riveting die carried by said member and adapted to be applied alternatively to a rivet on the anvil, a fluid pressure motor for said member, a high pressure fluid source, a low pressure fluid source, and means to connect either source to said motor.

7. In an electrlc riveter, an electrode anvil to receive thehead of a rivet, an opposed memes member movable to or from the anvil, an electrode and a riveting die adapted to be applied by said member alternatively to a rivet on the anvil, a fluid pressure motor to move said member to or from the anvil, a pressure fluid source, a valve to control the same, a handle for said valve, an electric current source and conductors to carry current through said electrodes and an interposed rivet, and a control switch for such current with its operated member in the handle of said valve.

8. In an electric riveter, an electrode anvil to receive the head of a rivet, an opposed member movable to or from the anvil, an electrode and a riveting die adapted to be applied by said member alternatively to a rivet on the anvil, a fluid pressure motor for said member, a high pressure fluid source, a low pressure fluid source, a valve adapted to connect said motor to either source or to exhaust the motor, a handle for said valve, an electric circuit adapted to be completed through said electrodes and an interposed rivet, and a control switch for said circuit With its operated member in the handle of said valve.

9. In an electric riveter, an electrode anvil to receive the head of a rivet, an opposed member movable relatively to or from the anvil, an electrode and a riveting die both carried by said opposed member, one of said two elements that are carried by said opposed member being relatively displaceable laterally so as to throw it in or out of aline ment with said anvil, whereby either said element carried by said opposed member may be brought into engagement with the rivet, and means to supply an electric current through said electrodes and. an interposed rivet.

10. In an electric riveter, an electrode anvil to receive the head of a rivet, an opposed member movable to or from the anvil, an electrode and a riveting die carried by said member and adapted to be applied thereby alternatively to the rivet or said anvil, fluid pressure means to operate said member, a control valve therefor, a handle for said valve, means to send a heating current through said electrode and a rivet between the same and said anvil, and a control switch for said means in said valve handle.

11. In an electric riveter, an electrode anvil to receive the head of the rivet, an electrode and a riveting die adapted to be applied alternatively to a rivet on said anvil, fluid pressure means for said riveting die, a valve to control the same, a handle for said valve, means to send an electric current through said electrode and said anvil and an interposed rivet to heat the latter, and a control switch for said current in the handle of said valve.

In testimony whereof I aiiix my signature, in presence of two Witnesses NEIL MACN Witnesses ANNA M. WALSH, L'rowi LAMGT'I. 

